My process usually goes:
1) Depression because I can't come up with story ideas.
2) This song/substance/random event is making me see God and I can suddenly write. (For legal reasons this is a joke.)
3) Mope about, before finally settling on a story I'm happy with.
4) Write it all out. Sometimes (as seen here), visual examples are needed.
5) Make rough draft in RPG Maker.
6) Fill in that rough draft.
7) Keep coming back to the scene until it is perfect.
8) Come up with new, cooler lore that contradicts a scene.
9) Edit it to fit.
10) Repeat steps 7-9 until there's nothing more that can be done without fundamentally changing the scene.
11) Don't profit, because I make weird art for fun. :)